Crushing machine



Sept. 15, 1931. D. B. cooPER 1,823,437

CRUSHING MACHINE Filed Feb. 14. 1929 4 4067 1 24 v ailr jouwyezgPatented Sept. 15, 1931 ENE STTS DHANJISHAH BOMCNJEE COOPER, F SATARA,INDIA CRUSI-IING MACHINE Application filed February 14, 1929, Serial No.339,993, and in Great Britain February 22, 1928. i

This invention relates to crushing machines, and more particularly tosugarcane crushing mills and has for its object to pro vide improvedforms of bearings for the shafts of the crushing rollers which bear ingsprevent irregular working of the shaft, increase the life of thebearings, render the machine more efficient in operation and diminishthe power required to drive the machine.

The crushing machine according to the present invention comprisesimproved bearings for the crushing roller shafts which bearings areessentially characterized in that the bearing bushes are of polygonalform externally and are mounted in correspondingly shaped seatings, sothat they can be taken out from time to time as they become worn andreplaced in a different angular position so as to present a new wearingsurface to the shaft, and take up any play due to the wearing down ofthe bush. It is preferred to make the bushes and their seatings ofhexagonal form so that six newrubbing faces can be presented to theshaft at the point where the pressure produced by the crushing rollersis greatest. This arran-gement is very advantageous where the machinesare employed in places remote from industrial districts and where thereplacement of worn parts involves difficulty and delay.

In a sugar-cane crushing machine the crushing rollers are mountedvertically, and in such a machine the upper polygonal shaped bushes areeach preferably provided with an absorbent packing ring closelyencircling the shaft, and an oil well above the said absorbent ring andin communication with it through small oil ducts.

The lower bearing bushes of the crushing rollers are preferably closedat the bottom ends and provided with upwardly convexed bearing blockswhich bear against the lower :5 ends of the shafts and support the saidshafts endwise.

The upper and lower bearing bushes are preferably provided with helicaloil ducts on their inner surfaces extending clownwardly from their upperends in order to ensure the passage of oil over the entire bearings andthus keep the bearings efiiciently lubricated.

- In order that the invention may be understood and ascertained it willbe more fully described with reference to the accompanying drawings asapplied to a machine for crushing sugar-cane.

In the said drawings,

Figure 1 is a vertical central section of a crushing machine providedwith bearings according to the invention,

Figure 2 is a section on an enlarged scale of one of the upper bearingbushes shown in Figure 1,

Figure 3 is a plan of the bearing bush shown in Figure 2,

Figure 4 is a section on an enlarged scale of one of the lower bearingbushes,

Figure 5 is a plan of the bearing bush shown in Figure 4. I

Referring to the accompanying drawings the sugar-cane crushing machineshown in Figure 1 is of known constructionand comprises the usualcrushing rollers 10 and ll known as king and queen rollers, fast uponthe vertically disposed shafts 12 and 13. The upper and lower ends ofthe shafts 12 and 13 are mounted respectively in bearings in the covermember 14 and base member 15 of the machine. The upper bearings for theshafts are each identical with one an other, and comprise bearing bushes16 which, in the example shown are of hexagonal shape externally andthese bushes 5 have an easy fit in correspondingly shaped seatings sothat they may be readily slipped out, partially turned and replaced soas to present a new wearing face to that side'of the shaft which exertsthe most intense 9o pressure upon the bush. The lower bearing bushes 17are also of similar shape on their exteriors and fit intocorrespondingly shaped seatings for the above mentioned purpose.

The upper bearings 16 are each provided with a packing washer 18 ofabsorbent material disposed in an annular recess 19 formed in the upperpart of the bush. The top of the recess 19 is closed by an annularmember 20 which is channelled to form an oil well and has oil ducts 21at the bottom permitting the oil to have access to the absorbent packingwasher 18. The collar is secured in position on the bush by screws 22,and the inner surface of the bush is preferably provided with a. helicalchannel 21a permitting oil to run down.

The lower bearings 17 are each closed at the bottom end as at 23 andprovided with I a block 24 having its upper surface convexed orspherical. This block is secured against rotation by pins 25. The lowerends of the roller shafts 12 and 13 are of convexed or spherical form asat 26, and be tween the said shafts is a freely rotatable block 27having its upper and lower surfaces convexed or spherical in shape. Theconvex blocks 24 and the double convex blocks 27 which are preferably ofhardened steel support the shafts 12 and 13 endwise and permit them torotate with a minimum of friction. The upper ends of the lower bushesare bevelled as at 28 to form recess for lubricating oil, and innersurfaces of these bushes are preferably provided with ahelical groovewhich permits the oil to work downwardly over the entire inner surfaceof the bush and to have access to the friction surfaces of the blocks24: and 27.

It may be noted that for mounting the axles of wheel-barrows it has beenproposed to use a pair of bearing bushes each of which is cap-like formto it over the ends of the axle, the exterior of the caplike bushes heing of hexagonal form and fitting into a correspondingly shaped pocketor recess in the bearing blocks and I make no claim to such herein, alsoI do not claim broadly the double-convex blocks which support the shaftsendwise.

I claim:

1. A hearing for the roller shafts of crushing machines comprising incombination, a solid bearing bush of polygonal shape externally andhaving an enlarged bore for a short length at one end thereof, acorresponding internally shaped polygonal seating on the machine, a padof absorbent packing material adapted to be carried within the saidenlarged bore and to closely encircle and engage the roller shaft and anoil well in communication with the said pad. v

2. A bearing for the vertical roller shafts of crushing machinescomprising in combination, a solid bearing bush of polygonal shapeexternally and having an enlarged bore for a short length at the top endthereof, a corresponding internally shaped poly onal seating on themachine, a pad of absorhent packing material adapted to be carriedwithin and to fill the said enlarged bore and to closely encircle andengage the roller shaft and an annular channel shaped oil well securedover the said enlarged bore,

having oil ducts communicating between the bottom of the channel and thesaid absorbent pad.

3. A hearing for the roller shafts of crushing machines comprising incombination, a solid bearing bush of hexagonal shape externally andhaving an enlarged bore for a short length at one end thereof, acorresponding internally shaped hexagonal seating on the machine, a padof absorbent packing material adapted to be carried within the saidenlarged bore and to closely encircle and engage the r ller shaft and anoil well in communication with the said pad.

4. A hearing for the vertical roller shafts of crushing machinescomprising in combination, a solid bearing bush of hexagonal shapeexternally and having an enlarged bore for a short length at the top endthereof, a corresponding shaped hexagonal seat ing on the machine, a padof absorbent packing material adapted to be carried within and to fillthe said enlarged bore and to closely encircle and engage the rollershaft and an annular channel shaped oil well secured over the saidenlarged bore having oil ducts communicating between the bottom of thechannel and the said absorbent pad.

In testimony whereof I have signed my name to this specification.

DHANJISHAH BOMONJEE COOPER.

